CN102981767B - A kind of individual Chinese character hand-written recognition method and system - Google Patents

Abstract

The invention relates to a single Chinese character handwriting recognition method for a terminal with a handwriting recognition function. The method is to obtain the first letter of the pinyin of a Chinese character input through a virtual keyboard of a touch screen or input the first letter of a Chinese character pinyin through a handwriting input recognition area of a touch screen ; Recognize the acquired first letter as a letter code and prefetch Chinese characters in the pre-stored Chinese character library according to the letter code; obtain the strokes of Chinese characters input by the handwriting input recognition area of the touch screen; recognize the strokes obtained as stroke codes; The stroke code is to search the Chinese character with the stroke code in the pre-stored Chinese character library, and display the Chinese character selection option on the touch screen and display the selected Chinese character according to the user's selection confirmation information. The invention also relates to a single Chinese character handwriting recognition system. The handwriting recognition method and system combine pinyin and stroke input, which improves the input efficiency, and improves the success rate of input recognition by reducing the input of handwritten strokes and pinyin letters.

Description

A single Chinese character handwriting recognition method and system

technical field

The invention belongs to the field of Chinese character recognition, in particular to a single Chinese character handwriting recognition method and system.

Background technique

One of the existing Chinese character input methods is a pure pinyin input method, that is, the entire pinyin of a Chinese character is given, and then the system provides words that match the pronunciation for selection to determine the final input Chinese character.

One of the existing methods is a pure handwriting input method, that is, write all Chinese characters on the screen, then wait for 1 second, and the system recognizes, and provides 4-8 recognized results for selection to determine the final input Chinese characters. Handwritten Chinese character input method such as Apple mobile phone and tablet computer, Samsung mobile phone and tablet.

The above-mentioned input method relies on the input coding of Chinese characters to input Chinese characters, that is, by coding pronunciation, strokes, etc., and inputting through keyboard keys. These methods do not make full use of the characteristics that the current smart phone touch screen can carry out character recognition, and do not give full play to the existing functions of smart phones and tablet computers.

The method provided by the invention is the core method for performing Chinese character recognition and input in mobile devices such as smart phones or tablet computers. It is mainly used in smart terminals with handwriting recognition function, such as smartphones and tablets. This method is used for fast input of Chinese characters.

Contents of the invention

The technical problem to be solved by the present invention is to provide a single Chinese character handwriting recognition method and system for the deficiencies of existing Chinese character handwriting recognition methods. fast input.

The technical solution adopted by the present invention to solve its technical problems is:

A single Chinese character handwriting recognition method is provided, comprising the following steps:

Obtain the initial letter of pinyin of Chinese characters input through the virtual keyboard of the touch screen or the initial letter of pinyin of Chinese characters input through the handwriting input recognition area of the touch screen or the initial letter of pinyin of Chinese characters input through voice recognition technology;

Recognize the acquired first letter as a letter code and prefetch Chinese characters in a pre-stored Chinese character bank according to the letter code, and the letter code corresponds to 26 English letters on the virtual keyboard;

Obtain strokes of Chinese characters input through the handwriting input recognition area of the touch screen;

If the number of strokes obtained is not more than three, then identify the strokes obtained as stroke codes, and the stroke codes include six strokes: horizontal, vertical, left, right, dot and fold;

According to the recognized stroke code, the Chinese character with the stroke code is searched in the pre-stored Chinese character library, and the corresponding Chinese character selection options are displayed on the touch screen; the selected Chinese character is displayed according to the user's selection confirmation information.

According to the above scheme, when the number of strokes input through the input recognition area of the touch screen is less than three, and the input stops exceeding the preset time, it is confirmed that the stroke code input is completed.

According to the above scheme, the storage structure of the pre-stored Chinese character library in the described Chinese character handwriting recognition method is: a one-way linked list of Chinese characters with the same initial letter stored according to the word frequency ordering, and the similar characters under the same initial letter according to strokes A tree linked list stored sequentially. , in actual use, after the stroke code is input, the Chinese character handwriting recognition method program displays the corresponding Chinese character selection options on the touch screen according to the above-mentioned preset arrangement sequence of Chinese characters.

According to the above scheme, in the step (3) of inputting a single Chinese character, after the corresponding Chinese character selection option is displayed on the touch screen, the fourth stroke of the Chinese character can also be input through the handwriting input recognition area of the touch screen.

According to the above scheme, the stroke code of the Chinese character input through the touch screen is the stroke of the left half or the upper half of the Chinese character input on the touch screen in turn, which is recognized by the touch screen as the stroke code.

The second technical scheme that the present invention solves its technical problem adopts is:

Provide a single Chinese character handwriting recognition system, including:

The storage module is used to store the Chinese character library in advance;

The letter code obtaining module is used to obtain the first letter of the pinyin of Chinese characters input through the virtual keyboard of the touch screen or the first letter of the pinyin of Chinese characters input through the handwriting input recognition area of the touch screen or the first letter of the pinyin of Chinese characters input through voice recognition technology;

Alphabet code identification module, for identifying the acquired first letter as letter code and prefetching Chinese characters in the pre-stored Chinese character storehouse according to said letter code, said letter code is corresponding to 26 English letters on the virtual keyboard;

The stroke code obtaining module is used to obtain the strokes of Chinese characters input in the handwriting input recognition area of the touch screen;

The stroke code recognition module is used for if the number of strokes obtained is not more than three, then the strokes obtained by recognition are used as stroke codes, and the stroke codes include six strokes: horizontal, vertical, left, right, dot and fold;

The Chinese character display module, according to the recognized stroke code, retrieves the Chinese character with the stroke code in the pre-stored Chinese character library, and displays the corresponding Chinese character selection options on the touch screen; displays the selected Chinese character according to the user's selection confirmation information.

According to the above scheme, the single Chinese character handwriting recognition system also includes:

The input confirmation module is used to confirm that the stroke code input is completed when the number of strokes input through the input recognition area of the touch screen is less than three, and the input stops exceeding the preset time.

The beneficial effects of the present invention are:

The method provided by the present invention can improve the efficiency of input: the present invention makes full use of the characteristics of the touch screen, and does not need to input through keyboard keys. Using the present invention, only the first letter of Chinese pinyin and some strokes can be input, and there is no need to input all strokes and almost all strokes. Pinyin, the number of Chinese characters input per unit time is increased, which can realize the rapid input of Chinese characters.

In addition, the method provided by the present invention can improve the success rate of input recognition: the present invention simplifies input by reducing the number of handwritten input strokes, such as only the left half, the upper half, or the first 4 strokes and only inputting the first letter of Chinese pinyin , can improve the success rate, time and efficiency of recognition. In addition, due to the rapid filtering and searching of Chinese characters according to the first letter at the same time, the number of optional Chinese characters is reduced, the recognition rate is improved, and the time for Chinese character input is reduced.

Description of drawings

Fig. 1 is a flowchart of an embodiment of the method of the present invention.

Fig. 2 is a schematic diagram of the system structure of the system of the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

The single Chinese character handwriting recognition method in the embodiment of the present invention can be mainly applied to smart terminals with handwriting recognition functions such as smart phones and tablet computers, and can be used as a core method for Chinese character recognition and input on mobile devices such as smart phones or tablet computers, so as to realize fast input of Chinese characters .

Fig. 1 is a flowchart of an embodiment of the method of the present invention.

In this embodiment, the concrete steps of single Chinese character handwriting recognition method are as follows:

S1. The terminal with a touch screen acquires the first letter of the pinyin of the Chinese character, which can be input through the virtual keyboard of the touch screen or the first letter of the pinyin of the Chinese character through the handwriting input recognition area of the touch screen or input of the Chinese character through speech recognition technology The first letter of the pinyin to get the first letter of the Chinese character;

S2, a terminal with a touch screen then recognizes the acquired first letter as a letter code and prefetches Chinese characters in a pre-stored Chinese character library according to the letter code, and the letter code corresponds to 26 English letters on the virtual keyboard;

S3. The terminal with the touch screen obtains the strokes of the Chinese characters input through the handwriting input recognition area of the touch screen; if the number of strokes obtained is not more than three, the strokes obtained by recognition are used as stroke codes, and the stroke codes include conventional horizontal, vertical, left and right strokes , point, fold, etc.;

S4. When the number of strokes input through the input recognition area of the touch screen is less than three, and the input stops exceeding the preset time (the preset time is 2 seconds), the terminal with the touch screen confirms that the stroke code input is completed;

S5. The terminal with a touch screen retrieves the Chinese character with the stroke code in the pre-stored Chinese character library according to the recognized stroke code, and displays the matching Chinese character selection options on the touch screen; according to the user's selection confirmation information, the selected Chinese character.

In this handwriting recognition method, the method of Chinese character encoding is that the first sign indicating number is the first letter of pinyin of required recognition Chinese character, is letter sign indicating number; From the second sign indicating number, the stroke that is pulled out according to order of strokes for required input Chinese character, can be this Chinese character The first 3 strokes or the left half or upper half of the input Chinese character form a stroke code.

In this handwriting recognition method, the storage structure of the pre-stored Chinese character library is: a one-way linked list of Chinese characters with the same initial letter stored according to the word frequency sorting, and a tree-shaped linked list that stores the similar characters under the same initial letter according to the order of strokes . That is to store the Chinese characters with the same consonants as a one-way linked list, save the Chinese characters in the linked list in turn according to the frequency of use of the Chinese characters, and save the near characters under the same consonants as a tree-shaped linked list according to the order of strokes, that is, stroke differences are used as branches of the tree (sibling node).

The sorting of Chinese characters is realized in advance through the above storage structure. In actual use, after each code is input, the program of the handwriting recognition method provides Chinese character selection options according to the preset sorting order of Chinese characters.

When inputting Chinese characters, first activate this handwriting recognition method, for example, input a character "李":

First, select the first letter of the Chinese character from the keyboard area of 26 pinyin letters displayed on the touch screen: L, and then input horizontal, vertical, and apostrophe in sequence in the handwriting area of the touch screen. The optional characters displayed on the touch screen are: 1. Floor 2. Lin 3. Li 4. Leng, you can directly select 3. Li to complete the input of this character.

The present invention fully utilizes the characteristics of the touch screen, and does not need to input through keyboard keys. Using the present invention, only the first letter of Chinese pinyin and some strokes can be input, and there is no need to input all strokes and almost all pinyin, and the number of Chinese characters input per unit time increases.

Utilize above method, the present invention also provides a kind of single Chinese character handwriting recognition system, system structural diagram as shown in Figure 2, specifically comprises:

Storage module 1, for pre-storing the Chinese character library;

Alphabet code obtaining module 2, is used for obtaining the first letter of the Pinyin of inputting Chinese character by the virtual keyboard of touch screen or the first letter of Pinyin of inputting Chinese character by the handwriting input recognition area of touch screen or inputting the first letter of Pinyin of Chinese character by voice recognition technology;

Alphabet code recognition module 3, is used for identifying the first letter that obtains as letter code and prefetches Chinese character in the Chinese character base stored in advance according to described letter code, and described letter code is corresponding to 26 English letters on the virtual keyboard;

The stroke code obtaining module 4 is used to obtain the strokes of Chinese characters input by the handwriting input recognition area of the touch screen;

Stroke code recognition module 5, is used for if the number of strokes that obtains is not more than three, then will recognize the stroke that obtains as stroke code, described stroke code includes horizontal, vertical, cast aside, press down, dot and fold six kinds of strokes;

The Chinese character display module 7, according to the identified stroke code, retrieves the Chinese character with the stroke code in the pre-stored Chinese character library, and displays the matching Chinese character selection option on the touch screen; the selected Chinese character is displayed according to the user's selection confirmation information.

Further, in another embodiment of the present invention, the system also includes an input confirmation module 6, which is used to confirm that the stroke code input is completed when the number of strokes input through the input recognition area of the touch screen is less than three, and the input stops exceeding the preset time .

How to recognize Chinese characters during specific use can refer to the specific embodiments in the method part, and details will not be repeated here.

It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should belong to the protection scope of the appended claims of the present invention.

Claims (6)

1. an individual Chinese character hand-written recognition method, is characterized in that, comprises the following steps:

Obtain the initial of the phonetic of the dummy keyboard input Chinese character by touch-screen or inputted the initial of the initial of the phonetic of Chinese character or the phonetic by speech recognition technology input Chinese character by the handwriting input identified region of touch-screen;

Identify that the initial that obtains to be looked ahead Chinese character according to described character code as character code in the Chinese character base prestored, described character code corresponds to 26 English alphabets on dummy keyboard;

Obtain the stroke of the handwriting input identified region input Chinese character by touch-screen;

If obtain stroke number be not more than three, then identify that the stroke of acquisition is as stroke code, described stroke code comprise horizontal, vertical, skim, right-falling stroke, point and folding six kinds of strokes;

According to identified stroke code, in the Chinese character base prestored, retrieval has the Chinese character of this stroke code, and demonstrates the Chinese character selection option met on the touchscreen; According to the selected Chinese character of selection confirmation display of user;

The storage organization of the described Chinese character base prestored is: the single-track link table of the Chinese character of the same initial stored according to word frequently sequence, and by tree-like chained list that the nearly word form under same initial is preserved according to stroke order.

2. individual Chinese character hand-written recognition method as claimed in claim 1, is characterized in that, when the input identified region number of strokes by touch-screen is less than three, and input stopping exceedes Preset Time, then confirm that stroke code has inputted.

3. individual Chinese character hand-written recognition method as claimed in claim 1, is characterized in that, after demonstrating the Chinese character selection option met on the touchscreen, also comprises step:

Receive the 4th stroke by the handwriting input identified region input Chinese character of touch-screen and identify, to reduce the quantity of optional Chinese character.

4. individual Chinese character hand-written recognition method as claimed in claim 1, is characterized in that: what obtain is input the left-half of this Chinese character or the stroke of the first half successively on the touchscreen by the stroke code of touch-screen input Chinese character.

5. an individual Chinese character hand-written discrimination system, is characterized in that, comprising:

Memory module, for prestoring Chinese character base;

Character code acquisition module, for obtaining the initial of the phonetic of the dummy keyboard input Chinese character by touch-screen or being inputted the initial of the initial of the phonetic of Chinese character or the phonetic by speech recognition technology input Chinese character by the handwriting input identified region of touch-screen;

Character code identification module, for identifying that obtained initial to be looked ahead Chinese character according to described character code as character code in the Chinese character base prestored, described character code corresponds to 26 English alphabets on dummy keyboard;

Stroke code acquisition module, for obtaining the stroke of the handwriting input identified region input Chinese character by touch-screen;

Stroke code identification module, if for obtain stroke number be not more than three, then will identify obtain stroke as stroke code, described stroke code comprise horizontal, vertical, skim, right-falling stroke, point and folding six kinds of strokes;

Chinese disply module, according to identified stroke code, in the Chinese character base prestored, retrieval has the Chinese character of this stroke code, and demonstrates the Chinese character selection option met on the touchscreen; According to the selected Chinese character of selection confirmation display of user;

The storage organization of the described Chinese character base prestored is: the single-track link table of the Chinese character of the same initial stored according to word frequently sequence, and by tree-like chained list that the nearly word form under same initial is preserved according to stroke order.

6. individual Chinese character hand-written discrimination system as claimed in claim 5, it is characterized in that, this system also comprises:

Input validation module, is less than three for working as by the input identified region number of strokes of touch-screen, and input stopping exceedes Preset Time, confirms that stroke code has inputted.